Carbureter.



ALFRED C. STEWART. 0F LOS ANGELES4 CALIFORNA,

CARBURETER,

Specification of Letters PatentA nt exited July ik i912.

Application filed July 3l, 1911. Serial No, 64L654.

T0 all Phi/n1 it may comer/z Be it known thatl l, Ammin C. S'ii-wxirr, u citizen of the United States, residing tit Los Angeles, in the county of Los Angeles; und .Stute ot' California., have invented :t new' und useful Carbureter, of whieh the followingl is u speeitiention.

The mitin object ot' the present inwntion is to provide n curbt'ireter in which the menus for controlling the fuel regulating valve are at the top of the earhureter in po :ition for convenient manipulation.

Another object of the invention is to proide :t enrbureter in which the use of .stulling l :t iup-shaped vulve se-ttt member "tt boxes or similar expedients for the t'uel regulating means are dispensed with.

Other objects of the. invention will uppear hereinafter.

The accompanying drawings illustrate the invention` und referringz,r thereto: Figure l is i vertical section ot the carbureter. Fig. .2 is n vertical scction'on line elle# in Fig. l.

The eurhureter comprises a casing formed with :L eurbureter chamber l in its upper portion und un oil chamber 2 in its lower portion, said oil chamber being formed in a .Jowl-shnped member 2 attached to the eetsing l, und said casing being' formed with a plate or tlunge 3, closing the top otl the oil chamber. Between the plate or flange I3 und the enrbureter cl'nunber l, the cnsingjr is provided with :in nir inlet. chamber `l. open nt one side to the oute' uit' und conununienting with the cnrbureter chamber through un opening in the 'bottom of the eurbureter ehnmber` n vulve sent 5 being)- provided :it this` opening for coperution with the :tir vnlve. The rnrbureter chnmher 1 is provided with n lnterul extension t.y buv iin; nn culletlopeningg 7 in its top, :t throttle vulve 8 being provided in .said outlet opening. und menus being provided ut said openin; r for eonnection to the intake ot' un engine.

The nir vulve l0 is formed :is n eonieul heard on the upper' end ot' n hollow vulve .stein 11, said stem being mounted to slide vertically in :t tubular guide member l2 on the body or ensinprv of the eurbureter. re-

9 is formed in the cone slntped vulve member l0 for receiving the upper end of the tubular guide member when the vulve is in closed position. the member l0 teleseop ing over the member l2 und protecting the tubular guide from dust` und dirt. Said vulve member 10 is formedy with a shoulder thtl nir when the vulve is in lowermost. parisilion und above sziid shoulder the vulve nien;- ber l() in t'ornttd with n eorrugated wall tt., providing un evnporating surtaee tor the fuel. rthe valve stem l1 is formed with e. ventral bore or eA timber .t6 t'oinn;uneating nl its lower portion tl'irough a perforation 1T and channel t8 in the side of the valise vstem, und it perforation lit in the inici" guide l2, with the interior of the oi hm f.v 2. so that the eil from the oil ehunber enter the chmuber 1G within the votre s" A\t its upper end thi` chamber te rottami-ini entes with :i recess or chamber 2U formed in. 'hielt screws into ri recess in the upper porti of the vulve member` 1U, said repel-timed wenn ber 20 lntving un opening 22 in its. bottom, through which fuel may How inte einem fU' in the member il). The fuel faire e. sists ot :t eolnienl )big "23 tapering upward und extending within the vulve opening L., to open or close the sume. more or le` eeeording to the position of the plug 23 :ind the elevation ot' the alve member l0. Suid vulve plug 23 is preferably hungy l ely to enable it to ueeomnunlute itself t: *we per ingiifor exumphgby menne of it .iirot pin. 4 extending through the rnive piu; 3.3i and supported m n stud 15C ext ndizii flowny wurdly from :t screw flislt er closure t lul; fitti adopted to screw into it tupped opening i in the top ot' the etirbureter chzunoer l. Tin' @tud 24') is recessed its nt 2.3 to receive il@ springr 34 into engagement with notches ,1.2 f

in the closure plug 26 to l'oek it in set poni tion. Suid opening is of sutlieient size to enable the vulve member lt) und its uttzttltetl pnrts ttrbe removed through .snitl openingA when the ,member 2G has been removed. 'lo ietnin the`pin il in phtee :i `sleeie 2S univ be provided slidnbly mounted on the .stud und having un nnnuhtr flange "J surround ing Suid pin nud norumll'vv holding the mme from displacement, suid'sleeve being held town in position by u spring` El). The lower purl of vulve se-tt member 0 is reduced so :.s to form un nnnuhu space :il between the members` 20 und l0. this` space connecting with the interior of member l0` through per-- forntions 3Q in member 2t). :md member l() 13 adapted to seat on the sent 5 to shut ott t huving rmliul'pztssuges :t3 lending from spin-e f3] to the earbureter chamber. these passages opening at the corrugated wall'portions 14 of member 10.

The oil chamber member 2 may be' secured to the body of the carbureter by an annular tiange 33 on the bottom of the member 2. screwed on 'the lower end of the tubular member 12, a channel 3G being provided in this tubular member to allow oil to flow into the fpace Si' within this tiange and below the valve stem to enable the valve stem guide to act as adash pot.

Any suitable means may be provided for maintaining a definite level of oil in the oil chamber. Said means consisting. for example. .of a float il* pivotally mounted at 39.

within the chamber for controlling a valve 40 in the inlet passage or connection 41 for the fuel. Oil chamber '2 may be provided with a vent 43.

The operation is as follows: The oil being maintained at a definite level in the oil chamber. flows through the pasaages 19. 1S and 17 into the chamber 1G within the hollow valve stem. and when the throttle S is opened and the engine is in operation the suction from the engine produces a partial vacuum in the earbureting chamber 1. and causes the valve member 10 to be lifted. opening communication from the air inlet past said valve member into the carbureter chamber and also causing the valve :eat member 22 to move upwardly with reepect to the upwardliv tapering valve plug 23. thereby enlarging the opening between the fuel valve plug 23 and the valve seat member '2Q in correspondence with the opening of the air valve. The auction from the mixing chamber al o cause.Q the oil to riise in the chamber 16 of the valve member and to pase through the opening between the valve plug Q3 and the valve Seat member 22. and to flow into the chamber '20' in member '0 and out through the openings and passages 3Q. 231 and K55. the oil being discharged at the corrugated wall 14 in contartwith the air in the arbureter chamber and direetlv adjarent to the incomingr current of ait.' as it passes.V through the opening of the air valve. 'the valve plug :3 hangs in vertical position by gravity and adapts itself to any variations in the position of the valve seat member 2Q. In ease it is desired to remove the :tir valve. it iis only necessary to nmelew the closure member 26, remove .said closure member with the valve LIl attached thereto and lit't the valve member l0 with its vstem out through the opening` 'l`he fuel supply may be regulated at any time b v releasing the lor-king means 1H and 'turning the closure plug 2G to raiise or lower tht valve plug 23. lf at any time it i.: desired to replace the valve plug 23. this may be conveniently done. by removing.r the closure plugr '2H along 'with the valve plug,

pushing up the :sleeve 2g and removing the pin 24. and then inserting the new plu;r and replacing the pin and allowing the sleeve to Swing back to normal position.'

WhatI .I claim is:

1. In a carbureter. a easing provided with a carbureter chamber. an oil chamber below said carbureter chamber. an air inlet chamber between said oil chamber and earburet'er chamber. .said carbureter chamber having an opening in its bottom. comnnmicating with theair inlet chamber. a vertically movable valve for closing Said openine. .said valve having a vertical hollow :stem and provided with a valve seat at the upper poi tion of said stem. a tubular guide t'or said valve Stem. said guide and valve tem being provided With passages establishing communication for oil from the oil chamber to the interior of the valve stem. an upwardly tapering valve plug extending through the said valve seat in the upper port-ion of. the l valve, stem. and means in the top of theY carbureter chamber for supporting said valve plug.

In a carbureter. a casing provided with a carbureter chamber. an oil chamber below Said carbureter chamber. an air inlet chatnber between said oil chamber and carbureter chamber. said carbureter chamber having an openitw in its bottom, communicating with the an' inlet chamber. a vertically movable valve for closing said opening, said valve having a vertical hollow stem and provided with a valve seat at the upper portion of Said Stem. a tubular guide forfsaid valve stem. said guide and valve .stem being provided with passages establishing communication for oil from the oil chamber to the interior ofthe valve .stem.an upwardly tapering valve plug extending through the said valve .seat in the upper portion of the valve stem, and means,` in the top of the carbureter chamber for .supportlng said valve plug. comprising a plug .s:e1'e\vingintp the top of the earbureter chamber anda loose coimeetion-between eaid closure plug,r and .said valve plug to permit the valve plug to accommodate itself to .said valve seat.

3. ln a carbureter. a casing provided with a carbureter chamber. an oil chamber below said carbureter chamber. an air inlet chamber between said oil chamber and carburetor chamber. .Caid carbureter chamber having an opening in ita-bottom, communicating with the air inlet elr'lnber. a vertically movable valve for closing "aid opening. said valve having a vertical hollow stem and provided with a valve .seat at the upper portion of said stem. a tubular guide for .said valve stem. :said guide and valve Stem being provided with t'iaesages: establishing rommunication for oil from the oil chamber to the interior of the valve stem. an upwardly tapering valve plug extending through the i an 

